Dust cap for tire valves



Aug. 19 1924.

H. P. KRAFT DUST CAP FOR TIRE VALVES Filed July 17 1919 INS ENTOR z2 By A1701)! 3, W

WITNESS:

Patented Aug. 19, 1924;.

PATENT OFFICE.

HENRY 1P. KRAFT, OF RIDGEWOOD, NEW JERSEY.

DUST CAP FOR TIRE VALVES.

Application filed July 17,

To all 107mm it may concern:

Be it known that I, HENRY P. KRAFT, a citizen of the United States of America, residing in Plidgewood, in the county of Bergen and State of New Jersey, have invented certain new and useful Improvements in Dust Caps for Tire Valves, of which the following is a specification.

This invention relates to dust caps for tire valves, and aims to provide certain improvements therein.

The present invention is directed to the type or dust cap adapted to be held on the time valve stm by catches which yield in either direction as the cap is pushed on and. oh of the valve. By this means the cap requires no screwing motion to connect it to the valve, it being held by the resilient engagement of the catch or catches.

According to the present invention the catch members are preferably formed of wire having bent-in portions adapted to yieldingly engage the threads of the valve casing. By this means a simple and effective construction may be obtained. The invention also includes certain other features of novelty which will be hereinafter more fully described.

Referring to the drawings, which illustrste several forms of the invention,-

F'gure l is an elevation of the cap.

2 is a diametrical section thereof on an enlarged scale, showing a valve casing;- in elevation.

Fin. is section of Fig.

2 on the line 4.: is a view partly in elevation and in section taken at right angles to 2. looking; to the right.

5 is a sectional view of a modification. deterring: to the drawings, let A indicate the cap as a whole. It best comprises a cap portion and a foot portion C, the foot porti n serving to house the spring catch member D and to provide a better finish for the cap.

The spring; catch member I) preferably comprises a ring of wire of proper resilience, the two ends of which are bent in wardly as shown at E E to form spring catches adapted to yieldingly engage the threads of the valve casing. These catches are preferably separated sufliciently, so that 191a Serial No. 311,459.

if the flat F of the valve casing Gr should happen to coincide generally catches, at least one of the latter will engage the thread. i

In the construction shown the cap member is provided with a bead H at a point slightly above its bottom J, thus forming a recess below it in which the catch member I) is located. The foot portion is so formed as to constitute with the recess a chamber which is closed throughout except at an opening K (best shown in Fig. 4) through which the catch portions E E project inwardly to engage the valve casing. The foot member preferably comprises a bottom portion L, side portion M and top portion N, the top portion being turned over the bead H, so as to hold the foot in place.

In Fig. 5 I have illustrated two catch members D D one of which has its catch portions on one side and the other on the opposite side, so that they project inwardly toward. each other at diametrically opposite points. The arrangement of catch members, however, may be varied at will.

By the present construction a very cheap and efiicient form of quick detachable cap is provided, the spring grip upon the valve casing being suflicient to hold the cap in its closed or applied position.

While I have shown and described one form of the invention, it will he understood that changes may be made therein without departing from the spirit of the invention.

What I claim is 1. A dust cap having a cap portion, a foot portion in fixed relation'with a part of said cap portion and cooperating therewith to form an annular recess, an opening in said cap portion, and. spring catch means in said recess and having engaging means projecting inwardly through said opening.

2. A dust caphaving' a cap portion, a toot portion co-operating therewith to form an annular recess, said cap portion having an opening; at its lower end, and a circular spring wire arranged in said recess, and having its ends bent inwardly through said opening to engage the threads of the valve casing.

In witness whereof, I have hereunto signed my name.

HENRY P. KRAFT.

'ith the 

